Well the only thing destroyed was the synthetic stuff, by that I mean our VI's and AI's (witch were instrumental for much of our tech) but we have the ability to rebuild the VI's again no prob, the computers are still there and the programers would be racing each other for who could come out with the first multi purpose VI (construction, omnitool, medical uses etc) cause they would make a fortune as Everyone Needs VI's

Well, the structures are lost, but not necessarily the knowledge on how to make it. Besides, in the Destroy endings the Mass relays are fixed after a while, which means that there is indeed enough knowledge going about. If you can fix relays, im pretty sure u can fix an arm.